Biodiversity - from tigers in Bhutan to sea cucumbers living on the coral reefs of Madagascar to the mites on your cheese - is makes life on Earth livable for our species. By extinguishing hotbeds of biodiversity - rainforests, wetlands, coral reefs, and grasslands - we are destroying a part of ourselves. Biodiversity will recover after humanity is gone, but in the meantime, the continuing loss of our fellow species will make Earth an awfully crowded, but lonely place.